Hose-coupling.



P. E. PARADIS.

HOSE COUPLING. APPLICATION FILED MAR.17,1913.

Patented Mar. .31, 1914.

WITNESSES: 2W 5;. M

ATTORNEYS.

nos-1,759.

FREDERIKE. PARADIS, 0F BUFFALO, YORK.

nose-construe.

Application filed Harch. 17, 1913. Serial No. 754,673.

To all whom it may concern Be it known that I, FREDERIK E. PAnAms,

a citizen of theUnited States, residing at Buffalo, in the county ofErie and State of New York, have invented certain new and usefulImprovements in Hose-Couplings, of

which the following is a full. clear, and ex-; act description, such aswill enable others? skilled iii the art to which it appertains to makeand use the same." 1

This invention relates to conduits for air,

steam, and other fluids, and for electrical conductors and similarwires, and with respect to its more specific features to flexibleprotected conduits of the character referred to embodying couplingelements, whereby a single conduit of the-character referred to may bereadily attached to and detached from a conduit system composed of otheror like conduits.

The invention is specially applicable in i the air brake systems, steamand electric heating systems, and electric lighting systems of railwayrolling stock, offering many advantages in readily establishing,maintaining, and breaking the continuity of such systems, andfacilitating the repair or re placement of worn parts.- It probablyfinds its most important application in the short conduit coupling pipeemployed to establish continuity between the braking, heating andlighting equipment of railway cars and for this reason the disclosure ofthe invention is preferably-embodied in such a device, and one throughwhich .a' fluidis to pass.

One ofthe'objects-of the invention is the provision of protected or,armored conduits of practical construction permitting of the readyremoval of the inner conduit tube from the armor. a

- Another object of the. invention is the provision of coupling elementsfor armored conduits whereby a large part of the strains, due tointernal pressure, is taken up by the armor. Another object of theinvention is the provision ofsimple and. efficient means for connectingthe inner conduit tube to the armor tube sons to provide a fluid-tightjoint in the conduit system and without tendency to deface, destroy orperforate the inner tube. Other objects will be in part obvious and inart pointed out hereinatter.

Libs inventionaccordingly consistsin the Specification of Letters Patentwne 1m 31, 1 14,

elements and arrangement of parts which will beexemplified in theconstruction.herematter set forth, and the scope of the application ofwhich will be indicated in the following claims.

In the accompanying drawings, wherein similar reference characters referto, similar parts throughoutthe several views, Figure 1 illustrates thepreferred embodiment of the invention, a portion being partly brokenaway in order to disclose the interior arrangement; Fig. 2 illustratesan end view; and Fig. 3,a sectionon line 00 -00, Fig. 1.

Referring now more particularly to the drawings, the numeral 1 indicatesan inner cylindrical, flexible tube or conduit composed ofrrubber,rubber covered with can'- yes, or of other suitable material capable ofconducting'a fluid such as Wat/er or steam and also capable ofwithstanding the pressures wh1ch may beengendered therein. Or said innertube may be made of flexible material of'a characterto insulate anelectrical conductor passing therethrough.- The tube 1 is surrounded bya protective casing 2,

preferably metallic, and composed of spi-' rally disposed interlockingelements, so disposed as toform relatively large superficial I threads,as illustrated; the interlocking elements have some slight longitudinalplay, sald casing thus having some lateral bodily flexibility permittingit to be bent in various directions The character ofthe interlockedelements 1s preferably such as to cover the inner tube at all points,and while the form illustrated is preferred, any efiic ient and.suitable type may be employed. Thus the inner tube provides afluid-tight conduit and the outer-tube a flexible casing'relativelyclosely surroundingand protecting the inner tube, the two thus formingan armored hose.

In armored constructions previouslywm ployed,- -1t has been foundimpracticable to.

associate the armor tube with the inner flexible conduit in a simple andractical manner so as to provide an 'efliclen't fluid-tight connectiontherebetween Furthermore, in armored conduits as constructed heretofore,the armor has been so closely linked with the inner tube, or lining,that the two have become one for all practical purposes, the destructionof one involving the destruction of the other, and by reason of saidclose association oithe inner and the s features of construction,combinations of prior structures, any iriagularttis of the inner surfaceof the armor tube, or any special construction thereof wherebyprojecting portions occur olr the' inner surface frequently causedtherupture of the inner tube, especially adjacent the coupling elements,

whether the strains be due 'to internal pressure in the conduit or. tothe external force applied in assembling the inner and outer tu e withthe coupling elements, or

in bending the associated tubes. In order to avoid the above and otherobjections, the diameters of the inner tube and the armor tube ofapplicants construction are such that the former may be readily insertedor withdrawn from the latter, the outer diameter of the inner tubebeingpreferably smaller than the inner diameter of the armor tube so 'asto. fit lo'esely therein under inactive conditions.

The numeral- 3 indicates a coupling element, ferrule, or clamping jaw,having at ts outer end an 0 enlng providing an 1nner continuousconcentric wall or seat 4 ax- Y ially incliningand decreasin in sizefrom the outer toward the inner en thereof. The outside peripheral wallof the ferrule is preferably cylindricaland is threaded near the outerend as at 5 for a purpose which will be herein-after described. 'Theinner peripheral wall of the ferrule is of greater diameter than theinner end of the seat 4, and is; provided with armor retaining orholding means,preferablya series .of threads 6 of such dimensions-as tocorrespond with the threads formed by the spiral indentations of thearmor tube so that the latter' i -may be readily, as it were, screwedinto the ferrule and be supported and retained in.

position by the threads-6, The diameter. of

the-inner threaded portion of the ferrule is preferably suchthat whenthe armor tube is threaded therein the inner surface of the armor tubewill be almost flush with the inhome.) V p The numeral 8 indicates asecond, or companion, coupling element, or clampingjaw,

and preferably comprises a nipple having a fluid pass'ageway 9preferably vof substantially the same diameter as the innerdiameter ofthe'inner tube so as to reduce frie tion as much as possible,- and saidnipple is,

providedv with'outerscrew-threads 10 for at tachment to a train-pipesystem, so that the.

.cbudilit 1 will be connected therein, the passage Hahn's forming partof the-condultt he numeral llre'presents. a polygonal 'wallof the nipplewhich may beiengaged by a wrench or spanner when it is desired to turnthe ni ple, and 12 indicates an an nular flange o the nipplle adapted tobe engaged by an annular oulder 18 0f a jaw inserted wi be movedlongitudinally inwar packing or gasket.

.the ferrule are, so disppsed relative attaching means for the armor tu'e, that The nipple 8 comprises a reduced por-- tion 15, the exteriorwall 16 of which is conical or inclined to-the=longitudinal axis of thenipple, forming an inclined seat for.

the conduit 1, decreasing in diameter from the intermediate 'portion( ofthe nipple. Preferably the angle of the inclined wall 16 of'the. nippleis such that its conical sur face is parallel tothe conicaLwall 4 of'theferrule, and the wall 16 approximates the wall of the passagewa 9 at theinner end of the nipple, being slig tly inwardly reduced or curved atits end portion as at 17.

In assembling the parts, the conduit 1 is introduced into the armor tube2 and a projecting portion of the conduit is then pushed into theferrule until it'is' transversely opposite the seat 4, with theextreme.end of the conduit substantially flu sh with the outerend of theferrule. The armor tube may then be screwed into the ferrule, if

this has not already been done. The extended reduced ortion 15 of thenipple is then tiiin the passageway of the inner tube and the couplingring 14 is placed in position with its flange 13 over the flan e 12andwith its threads engaging those 0 the outer end of the ferrule. enthe ring 14 is turned in one direction, the ni ple 8 will dly toward theinner tube and a'portion of the inner tube will be gradually compressed.between the tapering surfaces, or h'ose seats,.of the nipple andferrule,-and suflicient pressure may be developed to provide afluid-tight joint at this point, the inner tube being of relatively softmaterial and It will be observed that by the above de scribedconstructionsubstantially no transverse pressure occurs between thearmor tube and the flexible inner tube, and for this reason there-isnote'ndency forv the armor to'rupture or puncturethe inner, tube. The.

pressure at the joint is engendered by a longitudinalmovement of theparts as, dis tinct from a'direct transverse compression, so that eventhough'the armor tube be uite closely associated with the inner etube tere is no tendency to the production of'tfansverse pressuretherebetween. .lFurthermore, the axially inclined seats .of. the nippleand .to the 'ioo p servlng .3. I

thetransverse pressure developed'..by the Thug the n er tube and thearmor tube. 'are isproduced w lej at the same time the oose associationof thefarmof tube and the inner tube at oints beyond the joint ispreserved. Un er these circumstances, it will be readily perceived thatupon turning the coiipling ring in the opposite direction, the

pressure at the joint may be relieved, the

coupling removed and the inner tube readily drawn forth for repair,replacement or other purpose. Tendency of the armor tube to move in alongitudinal direction relaftively to the-inner tube or the ferrule isresisted by .its threaded engagement with the ferrule.

It will'be understood that when the inventionis embodied in a section ofa conduit such as illustratedand above described, the opposite end ofthe section is provided with similan coupling elements as indicatedgenera-11y at' 18.

-in a limiting As manychanges could bemade in the above construction andmany apparently widely different embodiments of this inven;, tion couldbe made without departing from the scope thereof, it is intended thatall matter contained in theabove description or shown in theaccompanying drawings shall be interpreted as illustrative and notsense. It is also to be undere language used in the following claims isintended to cover all of the generic and specific features of theinvention herein descri'bed a nd all statements of stood that t thescope of the invention which, as a matter f coact with a coupling memberof an adjacent section, the bore of said ni ple being substantiallyequal to the bore 0 said hose and the tapered end extending into saidhose to a point substantially opposite the end of said tube, a tubularferrule having the end of said hose between the a portion .of itsinterior surface formed to coact with the exterior surface of said armortube and prevent .relative longitudinal movement and its remaininginterior surface oppositely and correspondingly tapered to coact withthe tapered portion of the nipple and grip the end of the hosetherebetween, and an intervening member eoacting' I with said nipple andsaid ferrule to cause a relative longitudinal movement of said parts asit'is rotated to increase or decrease the gripping action on the endo-fsaid-hose between the correspondingly tapered surfaces.

2. A conduit section having a smooth uni-' form bore throughout, itslength, comprising an exterior flexible armor tube, a smooth flexibleho'se loosely surrounded thereby and ,i

projecting ing the ot er formed to coact with a coupling member of anadjacent section, the

bore of said nipple being substantially equal to the bore of said hoseand the tapered end extending into said hose toa point substantiallyopposite the end of said tube, a

tubular ferrule having a portion of its 1nterior surface formed: tocoact; with the exbeyond the end of said tube, a tubular n1 ple taperedat one end and hav- 'terior, surface of-said armor, tube and preventrelative longitudinal movement and its remaining interior surfaceoppositely and correspondin 1y tapered to coact with the tapered portionof thenip le'and grip the entire projecting end of t e' hosetherebetween, a flange on one of said parts and an exterior threadedsurface on the other, and an intervening member'eoacting' with theflange and threaded surface of said nipple and ferrule to cause arelative 'longitu ina-l movement of said parts as it is rotated toincrease or decrease thegrippiug action on correspondingly-..taperedsurfaces; v

in testimony whereof I aflix my signature, inthe' presence of twowitnesses.

F. EPARADIS. -Witnesses: I

JOHN W. DARLING, H. W. MCLERNON'. a

